package com.mmall.concurrency.example.count;

import com.mmall.concurrency.annoations.NotThreadSafe;

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Semaphore;

/**
 * Created by dingchen on 2018/7/6.
 */
@NotThreadSafe
public class CountExample1 {

    //请求总数
    public static int clientTotal = 5000;

    //同时并发执行的线程数
    public static int threadTotal = 200;

    public static int count = 0;

    public static void main(String[] args) throws Exception{
        ExecutorService executorService = Executors.newCachedThreadPool();
        final Semaphore semaphore = new Semaphore(threadTotal);
        final CountDownLatch countDownLatch = new CountDownLatch(clientTotal);
        for(int i = 0;i<clientTotal ; i++){
            executorService.execute(() ->{
                try {
                    semaphore.acquire();
                    add();
                    semaphore.release();
                }catch (Exception e){
                    System.out.print("exception"+e);
                }
                countDownLatch.countDown();
            });
        }
        countDownLatch.await();
        executorService.shutdown();
        System.out.print("count:{}," +count);
    }

    private static void add(){
        count++;
    }
}
